Joint for structural framework



April 24, 1945. s. F. M INTOSH JOINT FOR STRUCTURAL FRAMEWORK Filed Feb,4, 1944 INVENTOR Samuel F/ffiztash ATTORNEYS Patented Apr. 24, 1945.

2, 74,55 r t t v JOINT FOR STRUCTURAL meivrcwonn "Samuel F. McIntosh,Scarsdale, N. Y. Application February 4,1944, Serial N5. 521,044-

invention reference to the erection of modernlargebuildings and isdirected moreyparticularly to a noveltype of joint constituting animproved means for connecting together the beams, girders and 001-umnsof the framework.

With reference to the erection of structural steel framework, some ofthe principal advan tages which are attained by the type of joint taughtby this invention are; the elimination of.

bolts-and rivets and the noiseincident to the riveting of" theconnections during the erection of the structure; to make it possibleto. assemble, on the ground at the site of the building all of the beamsand girders which make upleach bay of each floor with all of the jointsthereof fully locked sothat said assemblages may be readily hoisted as xunits, disposed" in juxtaposition to the columns and expeditiouslysecuredv in place by using the same type of joints for connecting thegirders with the columns; embodying in the joint features ofconstructionbyvirtue of which the elements thereof when interengagedwith each other function to true up? or plumb and square the framework;the accomplishmentof the major portion of the form work on the thereof;the simplification of the. erection of the framework and its completionin a considerably lesser period of time than heretofore, while requiringless complicatedland simpler equip.- ment than previously required, thuseffecting an enormous saving in of the framework;

Other features of the invention reside, in. the provision of an improvedj'ointof. the indicated character which is adaptable to any architectsplan; which complies with building codes;

which requires no testing of parts; which per- I mits of computation ofall stresses using standard practice; which simplifies sho detailing;whichallows all welding. to be done in the shop; which necessitates nopunching. of. parts exceeding twenty pounds; which requiresno specialshop equipment? and which allows the painting of all parts in the shopby a dip, process after the welding has been done.

With the above enumerated and other objects in. view, the invention isset forth in greater,

detail in the following specification, particuthe overall cost ofcreation Claims. (01.. na -3c) structural steel framework such as isgenerally used in through a structural steel framework equipped with ajoint constructed in accordance with the invention and illustrating thesame connecting girders with a column.

Fig. 2 is a horizontal sectional view taken approximately on the line2.2 of Fig. 1-.

Fig. 3 is a collective perspective view of the angle plate elements ofone of the joints showing taken approximately on a the same in separatedjuxtaposition.

Pig, 4 is-a vertical fragmentary sectional view illustrating theimprovedjoint for-establishing a connection between a girder ands, beam.

Fig. 5 is a fragmentary sectional plan viewplane indicated bythe line5-5 in Fig. 4. i 1

Referring to the drawing by characters of reference, A- designatesgenerally a. columnincluding the usual web Hi and flanges III, while Bdesignates a girder the flanges l3.

The joints, constituting the present invention, are designed for thepurpose of'establishground and at a substantial saving in the cost ingconnections between the columns A and the girders B orbetween thegirders and beams or other members of a structural framework, and

each joint consists of a pair ofangle plate ele-I mentsC and Dwhich maybe produced from standard angle stock of the: desired width As shown inFigs. 1 and 2, the angle lplateelements 0 are secured respectively tothe web I0 andto.

one of the flanges fl. of the column A, said'elements being preferablyemployed in vertically spaced pairs.

Each angle plate element zonta-lweb portion [5, Hi depending fromthe Cincludes ahori-- an inner flan e portion inner edge of the web portionand an outer flange IT extending upheight to the an pointed out in theappended claims. .and

illustrated in which? "Fig. l is a fragmentary vertical sectionalviewthe accompanying drawing, in

wardly from the outer edge of the web portion, said outer flange I!being formed with a medial tongue portion 18 of reduced jwidth with[referenceto said flange and projecting upwardly from the upper edgethereof so that the portions of the upper edge of. saidi'fiangell whichi lie'on opposite sides of the tongue define sup.-

porting shoulders I9, the purpose of which will be hereinafterxsetforth.

Each of the angle plate element D consists of .a vertical web heightofthe outer flange ll of the angle. plate element 0. The element Dincludes a lower-horizontal flange portion 2| projecting inwardly fromthe lower edge of the web portion 2.0 and an upper horizontal flangeportion 22 extending outwardly from the. upper "edge of said web port on20. The lower flange portion 21 corincluding the web I2 and portion 20which corresponds in truding above the flange 22, when the elements Cand D are interengaged or nested as shown in Figs. 1 and 2. The undersurface portions of the flange22 adjacent the slot 23 are adapted torest upon the shoulders IQ of the flange I! when the elements and D areinterengaged, while the flange 2| rests upon and flatly contacts withthe weldin 28. When thus connected with the beams E the elements D havethe flanges 22 projecting outwardly beyond the ends of the beams withthe webs of said elements depending therefrom and the lower flangeprojecting outwardly from the lower edge of said web.

It will thus be apparent that by means of the type of joint disclosed,the girder B and beams E which make up each bay of each floor may beassembled on the ground at the site of the buildingand securely lockedtogether by bending the tongues I8 to locking position, while the formwork for the flooring may be applied, after which "said assemblage maybe readily hoisted as a unit,

web l5 and the web 20 is disposed parallel to and contiguous with theflange I1,

In practice, the inner face of the depending flange l6 of each angleplate element 0 is flatly abutted against and anchored to the Web ID orthe flange l I of the column A, as illustrated, preferably by filletwelding the same thereto as at 24 along the lower and side edges of theflange IS, with the web I5 disposedghorizontally and projectingoutwardly from the upper edgeof said flange and with the outer flange |1extending up wardly in spacedparallel relation to the web or flange ofthe column.

The upper horizontal flanges 22 which extend outwardly from the upperedges of the webs 20 of the elements D, are, disposed respectively inflat contact with the upper and lower surfaces of the flanges l3 of thegirder B, and, as shown, are anchored thereto preferably by filletwelding the samearound the sides and outer edges thereof as at 24 so asto secure the elements D to the flanges IS. The upper flanges 22 projecthorizontally outward from the ends of the girders, with the webs 2|]depending therefrom, while the lower flanges 2| protrude horizontallyoutward from said webs 20. After the girder B are hoisted into placewith the webs and flange of the angle plate elements 0 and D nested witheach other and with the slots 23 engaged over the tongues I8, a wrenchof suitable length'to provide the necessary leverage and having a socketat one end thereof adapted to fit over the protruding endofthe tonguesI8, is employed for bending the ends of the tongues to a ninety degreeangle, as shown,

thereby establishing the locking of the girders in connected relationtothe columns It will thus be apparent that the loads are carried by insaid "joints function in the same manner as set forth in connection withtheir use for connecting the girders to the columns. 'In this instancethe flange l6 of the element Cis welded to the web I2 of the girder. andpreferably only a single joint is employed forconnecting each end; ofthe beam to the girders. It. therefore follows that the flange 22 isformed with a medial notch 25 in its outer edge and if desired the web26 of the beam may be provided with a corresponding intermediatenotch21, which notches straddle the adjacent portionsqof the 'web andflangeandare anchored in associated relation by means of fillet disposedin juxtaposition to the columns and secured thereto by connecting thegirders therewith in the manner previously described.

In some instances and if desired, the outer edges of the lower flanges2| of the angle plate elements D of the joints which connect the girderswith the columns may be welded to the webs H) or flanges thereof eitheras auxiliary locking means to supplement the locking action of thetongues l8 or in lieu of the bending of the tongues for this purpose. Iti also possible to employ such welding on the joints which connect thebeams E with the girders B andthi may be resorted to in instances wherethe angle plates C and D are constructed of angle stock of an excessivethickness. I It will also be app a the ,welding of the angle plateelement to the members of the framework can all be done in the shop and,that after the welding, the members may be expeditiously andeconomically painted by a dipping process, thus avoiding the expense andtime involved in paintin the structure after erection. It is alsoobvious that due to. the close fit of the tongues l8 in the slots 23 andthe close tolerance to which the joints may be worked, said joints willfunction as a means for truing up the framework so as to plumb andsquare the same.

What is claimed is:

1. In a joint for establishing a connection be ,tween the column, girderand beam members of structural framework, interengageable angle plateelements secured respectively to the members to be connected, one of,which elements includes a horizontal web portion, an inner flangeportion depending from the, inner edge of the web portion anchored toone structural member, with the horizontal web portion projectingoutwardly therefrom, and an upstanding outer flange portion at the outeredge of the web portion having a medial upwardly projecting tongueofre-' outwardly therefrom andanchored to another structural member andformed with a slot corresponding in size and shape to the cross'sectional size and shape of and receiving therethrough the tongue of thefirst mentioned angle plate element and which tongue is bent atan angleto lock the elements of the joint in interengaged nested,

relation for connecting together the structural members to which saidelements are secured,

2. In a joint for connecting together the members of a structuralframework, a pair of angle plate elements each including a base portionwelded respectively to the members to be connected and each base portionhaving an angulated portion which angulated portion of one element isnested with the angulated portion of the other element, the base portionof one of said elements having a slot and the angulated portion of theother element having a tongue engaging through the slot of the baseportion of the first mentioned element with the free terminal of saidtongue protruding from the slot thereof, the free terminal of saidtongue being bent to overlie the base portion of the first mentionedslotted element adjacent the slotted portion thereof for locking theelements in nested relation and for securing the framework membersconnected.

3. A joint for connecting structural framework members togetherincluding a pair of mating elements respectively secured to said membersand having angulated nested portions, one of said eleto the slot forlocking the elements in nested relation to thereby connect the membersof the framework to which the elements are secured.

4. In a joint for connecting the column and members together as a unit.

girder members of structural framework, a pair of mating couplingelements for each joint respectively secured'to each adjacent pair ofstructural members, the elements of each pair having nested angulatedportions, one element of each pair having a slot, and a tongueprojecting from the other element of each pair with the tongue engagingthrough the slot of its mating element, said tongue being of across-sectional size and shape corresponding approximately to the sizeand shape of the slot and snugly fitting the same so as to square andplumb the framework.

5. In a joint for connecting and locking together the girder and beammembers of a structural framework which make up each bay of each floorto facilitate hoisting of the same into place as a unit, a pair ofmating coupling elements for each joint respectively secured to thegirders and to the opposite ends of the beams, said elements of eachpair having nested angulated portions, one element of each pair having aslot and a tongue projecting from the other ele v ment of said pair witha portion of said tongue engaging within the slot and with the terminalof said tongue protruding from the slot and bent to overlie andengagewith said firstmentioned element adjacent to the slot so as to lock thenested portions of the elements in mated relation and thereby connectthe girder and beam SAMUEL F. MCINTOSH.

